thompson



(ModeL) 0. B. THOMPSON.-

BOBBIN WINDE R.

No. 245,890. Patented Aug. 16.1881.

/wxwvd oa/ N. PETERS. Plmloivllm mpher. Washvnpon u. C.

UNITED' STATES PATENT OFFICE.

CHARLES B. THOMPSON, OF ST. OATHARINES, ONTARIO, CANADA.

BOBBIN-WINDER.

SPECIFICATION forming part of Letters Patent No. 245,890, dated August16, 1881.

Application filed January 20, 1881.

To all whom it may concern:

Be it known that I, CHARLES BROWN THOMPSON, of St. Oatharines, in thecounty of Lincoln, in the Province of Ontario, Domin- 5 ion of Canada,have invented certain new and useful Improvements in Bobbin-Winders forShuttle Sewing-Machines; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same.

The improvement relates to the construction of the presser-pad arrangedalongside of the bobbin; also, to an adjustable thread-guide; and,finally, to a spring tension device, in con- 1 nection with the severaloperative parts of the apparatus, as hereinafter fully described, andparticularly pointed out in the claims.

By reference to the drawings forming part of this specification it willbe seen that Figure 1 represents a front view of the device. Fig. 2 is adetached view of the under side of the thread-controller. Fig. 3 is avertical section of the same. Fig. 4: is the tension on the up a perback part of the frame. Fig. 5 is the end of bobbin, showing the slottherein. Fig. 6 is the end of the spindle, showing projections to fitinto the slot of bobbin. Fig. 7 represents a portion of the frame with amodified form of screw through which the thread passes, said figure alsoillustrating a modified construction of bearing or support for one endof the bobbin.

A is a metal frame of any form, preferably of the shape andconfiguration shown.

The presser-pad and thread-controller which 3 5 1 have devised iscomposed of two parts, one of which is the presser-pad plate B, and theother the shank B, to-which said plate is adjustably secured by means ofa screw, 0, passing through a slot in the plate. The shank is formedwith a hole, through which a pin, f, passes in order to hinge the screwto the frame A. The front plate, B, is curved, as at b, on its frontedge, and provided with projecting tips I) at each end of said curvededge. The 4 5 shank B of the presser-pad is set in a recess, g, in theframe A, and hinged by the pin f, and is held against or separate fromthe bobbin by means of a flat spring, g, secured to the rear side of theframe A, a section of which is shown at Fig. 3. The object of making the(ModeL) presser-pad in two parts is that the front curve of the plate 13may be nicely adjusted by means of the screw 0 for the laying on of thethread evenly, layer on layer, on the bobbin.

0 is a screw entering the small end of the frame A above the bobbin, inwhich is cut a vertical slot terminating in a guide-eye, c, for thethread to pass through on its way from the spool to the bobbin. Byslightly turning the screw the guide-eye c in the same is adjusted toguide the threadfrom the spool at a proper distance from and in a properdirection to the bobbin while being wound, it being obvious that if thescrew is turned partly round from the position shown in Fig. l thelength of thread between the guide-eye and the bobbin will be increased,and also that the line of thread will be directed from the guide-eye tothe bobbin, either to the right or to the left of the line of threadrepresented in said figure, according to the direction in which thescrew 0 is turned.

Instead of forming the screw with the eye 0, it may be simply providedwith a transverse slot or channel in its head.

1) is the tension device, attached to the upper back'part of the frame,for producing a slight draft or tension for steadying the thread in itspassage from the spool to the bobbin. This tension device consists of adisk supported on a screw that is secured in the frameA, a spring,

a, being arranged upon said screw, between its head and the disk,whereby a spring tension device is produced.

E is the driving-spindle, passing through an opening in the arm of thedevice. It is surrounded with a spiral spring, j, which adjusts it tothe bobbin.

b b are the projections 011 the inner end of the said spindle, tocorrespond with and enter the slot a in the bobbin to connect them.Motion is given to the bobbin and spindle by means ofia rubber wheel onthe end of said spindle, receiving its motion from the wheel of asewing-machine when it is made to impinge against it.

G is a short support at the other end of the bobbin, which support canbe adjusted by a small thumb-screw, 7a; or the short center or support Gcan be a screw fitted into the bear- I00 ing, which will bescrew-threaded internally, so that the center or support can be adjustedby simply turning the same.

In Fig. 7 the screw 0 is simply provided with a transverse channel, 0,which can be employed in lieu of the eye shown in Fig. 1; also, insteadof employing the set-screw k, the adjust able support can bescrew-threaded and arranged to work in a screw-threaded bearing, asindicated in said Fig. 7.

It will be observed that I do not claim the presser-pad alone, for ithas long been used for various purposes; nor do I claim the are orsegment edge thread -controller alone, for it has been used for variouspurposes; but

Ido claim as my invention- 1. The combination, with the frame and thebobbin-supports in a bobbin-winder, of the presserpad consisting of ashank portion hinged to the frame and subjected to springpressure, andthe presser-pad plate B,'adjustably secured to the said hinged shank,substantially as and for the purpose described 2. The combination, withthe main frame in a bobbin-winder, of the screw 0, provided with athread-guide, and adapted to be turned to vary the length of threadbetween its guide and the bobbin, and also to vary the position of theline of thread betweenthe two, substantially as described.

3. The combination, with the frame A, of the bobbin-supports, the screw0, and the spring tension device D, substantially as described.

Dated at Hamilton, Ontario, Canada, this 15th day of December, A. D.1880.

CHARLES BROWN THOMPSdN. V

In presence of- WM. BRUCE, CHARLES TAYLOR.

